DE102006027921A1 - Rotating package machine e.g. sacking machine, for filling e.g. cement in bag, has sensor device for stepless determination of amount of filling of filler in container in order to uniformly maintain amount of filling in container - Google Patents

Abstract

The machine (1) has a storage container (12) for intermediate storage of a filler. A dosing organ (3) is provided for feeding the storage container, and a filling device (5) fills bags (13). A sensor device (6) is provided for stepless determination of amount of filling (8) of the filler in the storage container in order to uniformly maintain the amount of filling in the storage container. The dosing organ is regulated by using a control equipment. An independent claim is also included for a method of operating a package machine for filling of bulk materials in bags.

Description

The The invention relates to a packaging machine and a method of operation a packing machine, wherein the packing machine in particular for filling Bulk goods in Sacks provided is. The invention is particularly suitable for filling building materials, such as. Cement, but also for filling granules or other pourable goods. The The invention will be described below by way of example with reference to the filling of Cement in sacks This application is not restrictive.

It Various packing machines are known in the prior art become. For example, packing machines have become known with the one or more filling devices in the form of e.g. filling tubes or filler neck equipped, to which the bags to be filled are attachable or to the ones to fill Sacks are attached can.

At known packing machines usually a reservoir is provided, as a buffer for the be filled filling serves. The buffer is fed with a conveying member. To the reservoir may be provided a mechanical switch when reaching a minimum level emits a signal, whereupon with the conveying member a replenishment of the reservoir triggered until a maximum switch responds. The replenishment can also timed.

A Recording the level via optical Sensors is usually not possible because the packing machines mostly located in dusty environments where it is difficult a reliable optical Receive signal.

adversely in the known device that is characterized by the highly fluctuating level in the reservoir different filling conditions result in a homogeneous and reproducible filling of the Bags make it difficult.

It Therefore, the object of the present invention is a device and a procedure available to provide, with or with the improved bottling is possible.

These The object is achieved by a packaging machine with the features of claim 1 and by a method for operating a packing machine with the Characteristics of claim 18 solved. Preferred developments of the invention are subject of the dependent claims.

A Packing machine according to the invention according to claim 1 is used for filling of contents in sacks. Especially serves the packing machine according to the invention for bottling of bulk materials in Bags. The packing machine comprises at least one storage container for Caching of the contents and at least one metering member for charging the storage container. Farther is at least one filling device for filling the sacks intended. A control device is used for control. The packing machine has at least one sensor device for stepless determination the capacity of the temporarily stored filling material in the reservoir on to the filling quantity Keep even in the reservoir to be able to.

The Packing machine according to the invention has significant advantages. By the sensor device for determination the capacity in the reservoir allows, the capacity to keep even moderately there at any time a signal over the level is present. Therefore, the filling quantity and thus the filling height over the operating period are kept virtually constant and varies in time considerably less than it does in the prior art was the case.

To the sensor device is particularly suitable, a continuous or infinitely variable amount for the filling quantity or the level of the to be filled Good in the reservoir issue. This will produce a corresponding continuous or quasi-continuous Charging the storage tank allows so that the product conveyed by the filling device constant or has substantially constant properties.

Under the term stepless measure of the filling quantity For the purposes of this application, it is understood that the measure of the filling level is not represents only two or three different levels, but that the Signal for a variety of different levels is different. infinitely variable For the purposes of this application is therefore a division into one Variety of discrete stages, as is common in digital signal processing. For example, the signal can be output with a resolution of 8 bits. Also a 10 or 12 bit resolution or even higher resolution is possible and prefers. Important is a relatively fine gradation in the preferred and desired filling range.

By the invention, an increased precision of the filling amount is achieved in the bagging. Furthermore, an increase and optimization of the bagging performance is achieved because, for example, double rounds are avoided by a more uniform and more precise filling of the bags. The working point of the packing machine can be set exactly, so that the respective time of completion of the filling the bags are more predictable, so that the filling parameters can be controlled more effectively.

The better conditions are, inter alia, caused by the product column over the conveying members the respective filling devices according to the invention a exerts almost constant pressure, so that consistent filling conditions are present and ensures a particularly uniform bag filling becomes.

According to the invention Therefore, the fluctuations in the filling of bulk materials considerably reduced. The filled Show bags more homogeneous properties. Due to the higher residence time of the filling material in the reservoir the packing machine conditionally, a higher degassing of the contents before bottling reached in the bag, so that in addition a higher filling speed is achievable because the process is optimal on the properties of the to be filled Bulk material adjusted can be. It is avoided that e.g. the first bags with filling bottled other properties be as later bottled Bags. By the average higher level in the reservoir can more uniform properties of the contents guaranteed become.

The Task of the reservoir or silos in packaging machines, it is among other things, a pre-venting of be filled filling material to bring about homogeneous and reproducible properties of the filling material when bottling to ensure. If the contents However, it is stored only very briefly in the reservoir, so it has a higher proportion of air on, which leads to a lower filling performance, since the additional contained air when filling the Sacks escape got to. Here, the present invention offers significant advantages, because a maximum level can be complied with, so that there is always enough time self-venting is available.

Everyone filling the packing machine can be a conveyor organ be assigned to the filling to control the bag. The funding body can e.g. as a conveyor turbine, as a screw conveyor or as an air conveyor be formed, which over Air supply the contents transported. It is also a gravity filling possible.

The Packing machine according to the invention is used in particular for packing pourable goods or granules into sacks. Such Machines are also referred to as bagging machines.

The Dosing for feeding the reservoir is in particular by the control device is controllable and becomes dependent on the sensor device e.g. operated clocked and periodically activated and stopped again. Also, a continuous addition is possible, depending on from the filling performance the dosing is controlled accordingly. When the feeder e.g. as a screw conveyor is executed, the speed of the worm drive can be adjusted accordingly.

Preferably the sensor device is arranged such that the sensor device a measure of the total weight the packing machine determined. Preferably, the sensor device comprises a weight sensor.

These Further developments are particularly advantageous because of the known Weight of the (empty) packing machine and the known weights of each Components based on the weight of the in the reservoir filling material deduced can be. This is a simple and particularly reliable determination the capacity possible. In particular, by such a measurement method and measurement errors avoided, e.g. can be caused by a direct Füllhöhenmessung. One such measurement error can e.g. occur when near the sensor just a high level present, which is a big one capacity pretends that but actually not everywhere is available. Over a Weight measurement can Such errors are avoided, since only the actual existing mass taken into account becomes. The weight sensor can also be used for direct detection of the filling quantity serve.

In Further preferred developments include the sensor device at least one pressure sensor. In a further embodiment, in addition to a weight sensor or at least in place of a weight sensor a pressure sensor may be provided. It can also be out of the signal of a Pressure sensor closed back to the weight become. If the weight or part of the weight of the packing machine acting on one or more pressure sensors can be determined by the applied Pressure the filling quantity be calculated.

In all embodiments of the invention is the use of strain gauges prefers. Preferably, the sensor device comprises at least a strain gauge.

In preferred developments is the packing machine on a support device or at several support facilities hanging stored. Then the weight of the packing machine by a suitable Weight sensor can be determined.

For example, a support or measuring rod can be provided, whose deflection is determined, in order to measure the total weight derive. The deflection can be determined directly on the support beam or on a measuring rod arranged parallel to it, for example. The deflection is preferably determined via a strain gauge. It is also an optical distance measurement possible. To protect the measuring system from dust, a suitable cover may be provided.

In In all embodiments, the contents in particular by means of the conveyor organ from the reservoir derived and over the filling device in the attached Sack passed on.

Especially Preferably, the packing machine is designed for processing valve bags. The bottled Sacks or valve bags can after removal from the filling devices additionally closed or e.g. welded be used to prevent the escape of material during further transport.

Of the reservoir can have different dimensions. Preferably he e.g. for bottling of building materials like cement a height between about 0.5 m and 2.5 m, in particular between about 1.0 m and about 1.5 m.

In all cases becomes the level during the Operating especially in the upper part of the reservoir held, for constant filling conditions to create.

The Packing machine can have several filling devices include and be designed as a rotating packaging machine. Both so-called rotating packing machines rotate the individual filling units a common vertical axis. Such machines allow one very effective fully automatic mode of operation, as plugging or attachments the sacks at a predetermined angular position and the removal of the bags at one other predetermined angular position takes place.

The Packing machines can also as stationary Packing machines may be formed, in which several packing machines or filling devices can be arranged in a row. Such machines will be referred to as an inline packer or a series packing machine.

In all embodiments may preferably at least one automatic Sackabwerfer be provided. It can be a sack chair for any filling device be provided, which also causes the Sackabwurf. Farther can also be provided at least an automatic Sackaufstecker be. Overall, the system is preferably fully automatic and executed includes a sack-pusher, a sack-shed and an automatic Bag feed and an automatic bag removal system, e.g. one Conveyor with integrated checkweigher to the weight the bottled Sacks of a final inspection to undergo. bags with too different bag weight are then sorted out.

In all developments and refinements is preferably everyone filling associated with a weighing device to determine a measure of the bag weight. The weighing device is used in particular when filling the bags to the filling of the Defined sacks to control. Here you can Signals of individual weighing devices in the determination of capacity considered in the reservoir become.

For example can in a sensory determination of the total weight of the determined weight the weight of the filling or packing machine in the empty Condition be deducted. The result is the capacity plus the weight of the at the individual filling facilities hanging Bags. Considering The signals of the individual weighing devices can be an exact measure of the stock quantity be determined.

But As a rule, can also without weighing devices from the total weight still be derived with sufficient accuracy, a measure of the capacity. In addition, in the simplest case the weight of the attached Even sacks not considered become. If enough great reservoir and few filling facilities or relatively small sacks the result determined in this way is usually still sufficient. In addition, over the current filling the individual sacks an estimated capacity the individual sacks be calculated. Such a determination usually provides sufficient Values, so that an explicit bag weighing is not required is to realize the invention.

The Adjustment of the packing machine takes place on bulk materials in particular fully automatic and automatic. The self-adjustment is done preferably such that when commissioning the packing machine with a new or different bulk material the reservoir the packing machine first maximum is filled, until the rocker arm or another suitable limit switch responds. To a local overcrowding of the reservoir To prevent, at a suitable location, preferably a scraper arranged, which extends radially in a rotating packaging machine and a leveling of possible Schüttguthügel effected so as to a local overfilling prevent.

When the reservoir is filled to the maximum and the Endabschalter the further filling of Vor At this time, the total weight of the filling is determined and set equal to the maximum possible weight and thus to 100% degree of filling. Subsequently, the filling amount in the storage container of the packing machine is maintained at an adjustable value, for example 85% of the maximum weight. For this purpose, the supply of additional material is interrupted by the dosing until the desired degree of filling is reached.

The further follow-up will be done automatically. If the filling rate is e.g. rises and more sacks per Packed unit of time, is correspondingly more filling material supplied by the metering or the. If at individual or all neck filling of sacks is set, the system automatically controls the Nachfuhr filling material down. The adjustable value for the degree of filling may e.g. from the material and its flow properties depend.

The automatic Adjustment works with every new material. The density of the new bulk material does not have to be known before. It gets easy with a blank one Packing machine started the process and it will automatically take so long filling material supplied until the limit switch for the maximum filling responds. By the difference of the then determined total packer weight and the tare weight of the packing machine is the total weight of the maximum capacity derived. Subsequently will be the filling quantity adjusted to the predetermined percentage and held there automatically, without the intervention of the user being necessary.

The Regulating the metering device does not have any information about the current filling rate of Equipment for filling to have. In the simplest case, a constant packer weight is sought. By periodically dropping full sacks, the total weight varies the packer. The differences are small, so that a scheme of the metering device, which aims at an overall constant packer weight, reasonable Delivers results. This will cause a periodically slightly fluctuating capacity in the storage container accepted, but harmless for the Bagging is, since the fluctuation range of the supply quantity approximately in the range of Sack weight is, while the capacity in the reservoir is a multiple of the bag weight.

In A preferred variant of the method becomes the weight signal taken periodically, and preferably at predefined angular positions the packing machine. This will be almost identical for each measurement Conditions produced, so that in the variant described above in front of lying slight systematic fluctuations almost impossible become.

In In a further training, the current sack weights are all up to date to be filled Including sacks, so that an exact result can be determined.

nowadays Chromate-free cement is made to contact cement eczema to avoid with the cement. The chromate reduction is in particular Iron (II) sulfate added. This is usually done in separate mixing silos into which the different components are introduced. Another known possibility is to add iron (II) sulfate to the finished cement. The apparatus Effort for it is huge, because a separate mixing device is used.

In preferred developments of the invention, the reservoir u.a. therefore of at least two metering or of a metering be fed with at least two metering devices. It can too three, four or more different metering or metering devices be used.

With This development of the invention is an admixture of a or multiple components with high accuracy possible. Additional upstream separate mixing devices are not needed. The mixture will be the individual product streams introduced in appropriate proportions in the reservoir. Advantageously, the Addition controlled by the mass flow of the main product. Since the supplied Mass flow according to the invention known is or is derived, can be added to the mass flow of the Additive or an additive can be calculated exactly. The mass flow of the additional product or other products is then on the respectively desired Flow regulated. For this purpose, the throughput of the additives each recorded and adjusted if necessary to maintain the mixing ratio.

About the Regulation will be the ratio the individual components exactly met. Because the capacity in the storage container is detectable at any time, is a timely control of the addition the individual components possible and preferred. In one example, the reaction time is only about 1 to 3 seconds. This is usually more than enough.

It has been shown that the mixing is very good and, for example in the case of building materials is completely sufficient. In the bagging of eg cement usually takes place in the conveying member of the respective filling device, an additional mixing instead, if the conveying member is formed, for example, as a conveyor turbine or screw conveyor, since therein an additional mechanical mixing he follows. In order to promote even better mixing of the different substances, an agitator or the like may be integrated in the reservoir.

It can Also, more than two substances are mixed together. For example can also three, four or five or more metering devices may be provided.

In In all embodiments, an additional Minimummelder provided be. When falling below the minimum capacity can be switched off or contents in the reservoir refilled become. A shutdown can also for reasons of explosion protection be useful and necessary to turbulence in Turbinenfüllsystemen filling material to avoid when the level is too low.

The inventive method According to claim 18 is used to operate a packing machine for filling filling in sacks, especially for filling of bulk materials in Bags. This is the filling in a storage container cached and it is the reservoir with a metering fed. The sacks are filled by means of at least one filling device. there the dosing is by means of a control device in dependence of the with a sensor device substantially continuously determined capacity of the temporarily stored filling material in the reservoir controlled to the filling quantity in the reservoir to keep even.

Preferably will be the filling quantity kept substantially maximum.

In preferred developments are the reservoir over at least two dosing or metering devices fed different contents.

In all configurations, the signal of the sensor device for Sacking detection can be used. A sack break can e.g. present if a sudden Weight loss of the entire packaging machine is present without a Sack was removed. If just a bag was removed and the weight loss is greater than that Weight of the removed bag, if there is a bag breakage, which took place at the same time as the bag was taken off. Upon detection a sack break can be the filling process stopped and / or an alarm signal is output.

In In all embodiments, the packing machine can also be used for filling liquids or pasty Serve substances.

Further Advantages and applications arise from the embodiment, the will now be described below with reference to the figures.

In this demonstrate:

1 a highly schematic plan view of a packing machine according to the invention,

2 a strong schematic side view of the machine after 1 .

3 a detailed view with a sensor device,

4 a further embodiment of a packaging machine according to the invention; and

5 An embodiment of a packaging machine according to the invention, which is rotatably mounted standing on the ground.

In 1 is a highly schematic plan view of a packaging machine according to the invention shown here as a rotating packaging machine with a total of six as filling tubes 5 trained filling facilities is executed. The packing machine turns to fill the bags 13 in the illustration 1 clockwise in the direction of the arrow "A." The sacks 13 can be made of paper and / or plastic.

An unillustrated Sackaufsteckautomat can be provided to the bags on the individual nozzles 5 aufzustecken at a defined angular position. The attachment can also be done manually by hand. After checking by the control device, whether a bag is attached to the nozzle, the filling process is started, in which the filling member is started and the bag on the filling tube 5 is filled.

Basically, a wide variety of materials with the packaging machine according to the invention 1 be bottled. Here in Ausführungsbei game the packing machine is used 1 for filling pourable goods, in particular cement.

at started filling process will be with you first fully open Trim the bulk material filled into the bag as so-called coarse flow. At the same time everyone gets involved Pruning the bag weight according to the so-called gross levitation method detected. The weight of the sack chair, the neck, the Sackes and the bag contents recorded and based on the known weights the individual components closed back to the filling weight of the bag.

When the filling of the bag 13 exceeds a predetermined level, the stuffing tube 5 partially closed and the bag only on the so-called fine flow further filled. Only a smaller amount of electricity is directed into the bag, around the largely filled bag 13 To take into account and to adjust the final weight of the bag exactly.

For example, usually at one to the filling line 14a with filling material 15a filled sack 13 continue to be filled with coarse flow, while at one to fill line 14b with filling material 15b filled bag, the fine flow is activated until the desired final weight is reached.

If the final weight of a bag 13 is reached, the filling process is stopped and dropped upon reaching the appropriate angular position of the bag and the conveyor belt 19 removed.

In the 2 shown side view shows that the packing machine via a support bar 2 is stored hanging. Warehousing 10 Under the packer here serves only for centering, but not for support.

In the illustrated embodiment, the reservoir 12 up to the filling level 9 with a filling quantity 8th filled. The course of the filling line 7 can vary slightly over the width of the reservoir. Due to gravity and suitable measures to compensate for the level, however, the fluctuations are small. The filling material is via a dosing 3 the reservoir 12 fed. The metering device 3 is here arranged in a radial region outside the center, so that substantially a uniform filling is achieved.

The packer or packing machine 1 has at least one sensor device to a measure of the capacity 8th the filling material in the reservoir 12 to determine. The sensor device 6 can have different sensors 6 . 6a . 6d exhibit.

For example, a sensor 6 be provided, which is the deflection of the support beam 2 detected. This can be done via strain gauges 6d take place, which are arranged in a suitable manner. Instead of such a sensor 6d can also be a pressure sensor 6a be provided, which receives the weight of the packing machine. One pressure sensor or several pressure sensors 6a can eg between the support beam 2 and the support 18 be provided. About the pressure signals can be concluded on the total weight. The individual weights of the empty packing machine and the sack weights can be subtracted, giving a measure of the filling quantity 8th is determined.

Depending on the substantially infinitely determined result then the metering 3 controlled to the level 9 to keep constant. The filler material is supplied to the metering device from a central warehouse or silo which is not part of the packaging machine. For safety is a limit switch in the form of a rocker arm 25 at the packing machine 1 provided, for example, an end stop of the metering 3 if a defect occurs.

The rocker arm 25 is also used when refilling with product to perform an automatic calibration by first filling the reservoir until the trigger arm responds. The then existing filling amount is set to 100% and then the supply is controlled so that the filling quantity is constantly at the desired value of eg 70%, 80%, or eg 90%. This provides a self-regulating system.

In the embodiment according to 1 and 2 includes the funding body 3 two conveyors 3a and 3b with which different materials can be supplied, for example, the materials necessary for filling of low-chromate cement. For metering, the amount filled per unit time is measured or discharged and the metering device is regulated in such a way that a corresponding mass flow is supplied.

A second mass flow or additive may be through a conveyor 3b the flow of the conveyor 3a be added. As a result, a sufficient mixing is achieved. The respective mass flows are regulated so that the filling quantity and the ratio of the two mass flows remain constant.

The packing machine in total is powered by a drive 4 turned.

In 3 is an enlarged view of a sensor 6 displayed. Here is the sensor using two spacer bars 21 at one parallel to the support beam 2 provided rod 20 intended. Depending on the deflection of the support beam 2 gives the strain gauge 6d corresponding signals.

To correct temperature influences, a temperature sensor 22 be provided. This can be caused by different temperatures deflections of the support beam 2 be calculated out.

In 4 is another embodiment shown in which a pressure or weight sensor 6b is provided. Here is the weight of the packing machine 1 over the sensor 6b and the here performed as a support centering 10 derived in the soil. It is also possible that on the upper support beams 2 even more sensors are provided. It is also possible that between the lower part 11 and the upper reservoir 12 Weight sensors are provided, via which the filling quantity is determined. The packing machine after 4 includes a separate Sackabwurf 16 who the individual sacks 13 yields.

The packing machines 1 be about controllers 17 controlled, which evaluate the signals of the individual sensors. In this case, a separate control and / or a central control device can be provided for each filling tube.

According to the embodiment 5 is the bagger 1 standing rotatably mounted on the ground. A stand storage 23 stores the packing machine and causes by means of a motor, not shown, the rotating rotational movement.

As a sensor 6 Here are several pressure or weight sensors 6c provided, which are preferably distributed uniformly over the circumference. For example, three sensors can be arranged at an angular distance of 120 °. In order to catch falling material, a drip pan can be provided, which optionally collects material that collects during collection of the bag, collects it and feeds it back into the process.

1

packing machine

2

shore

3

metering

3a

metering

3b

metering

4

drive

5

filling pipe

6

sensor

6a

sensor

6b

sensor

6c

sensor

6d

sensor

7

fill line

8th

capacity

9

filling height

10

centering

11

lower part

12

reservoir

13

bag

14a

fill line

14b

fill line

15a

filling material

15b

filling material

16

bag discharge

17

control

18

In stock

19

conveyor belt

20

pole

21

spacer bars

22

temperature sensor

23

article storage

24

scraper

25

cam follower

Claims (25)

Packing machine ( 1 ) for filling filled goods into sacks ( 13 ), in particular for filling bulk goods in bags, with a storage container ( 12 ) for temporary storage of the filling material, a metering device ( 3 ) for loading the storage container ( 12 ), at least one filling device ( 5 ) for filling the bags ( 13 ), a control device ( 17 ), as well as with a sensor device ( 6 ) for stepless determination of the filling quantity ( 8th ) of the intermediately stored filling material in the storage container ( 12 ) to the filling quantity ( 8th ) in the storage container ( 12 ) to keep even. Packing machine ( 1 ) according to claim 1, wherein the metering device ( 3 ) by means of the control device ( 17 ) is regulated. Packing machine ( 1 ) according to claim 1 or 2, wherein the sensor device ( 6 ) is arranged such that the sensor device ( 6 ) a measure of the total weight of the packing machine ( 1 ). Packing machine ( 1 ) according to one of the preceding claims, wherein the sensor device ( 6 ) detects a stepless signal which is proportional to the filling quantity. Packing machine ( 1 ) according to one of the preceding claims, wherein at least one limit switch is provided, which is activated when a maximum filling level is reached. Packing machine ( 1 ) according to one of the preceding claims, wherein a scraper for uniform distribution of the filling material is provided in the reservoir. Packing machine ( 1 ) according to one of the preceding claims, wherein the sensor device ( 6 ) a weight sensor and / or at least one pressure sensor ( 6 ). Packing machine ( 1 ) according to one of the preceding claims, wherein the sensor device ( 6 ) comprises at least one strain gauge. Packing machine ( 1 ) according to one of the preceding claims, which on a support means ( 2 ) is suspended. Packing machine ( 1 ) according to the preceding claim, wherein a measure of the total weight of a deflection of a support rod ( 20 ) is derived. Packing machine ( 1 ) according to one of the preceding claims, wherein the filling material by means of a conveying member from the reservoir ( 12 ) is derived. Packing machine ( 1 ) according to any one of the preceding claims, wherein the reservoir ( 12 ) has a height between 1 m and 2.50 m. Packing machine ( 1 ) according to one of the preceding claims, wherein a plurality of filling devices ( 5 ) are arranged and wherein the packing machine is designed as a rotating system. Packing machine ( 1 ) according to one of claims 1 to 12, wherein a plurality of filling devices ( 5 ) are arranged and wherein the packing machine is designed as a series packer. Packing machine ( 1 ) according to one of the preceding claims, wherein an automatic bag ejector ( 16 ) and / or at least one automatic sack plug is provided. Packing machine ( 1 ) according to one of the preceding claims, wherein each filling device ( 5 ) is associated with a weighing device to determine a measure of the bag weight. Packing machine ( 1 ) according to any one of the preceding claims, wherein the reservoir ( 12 ) of at least two metering devices ( 3a . 3b ) is charged. Method for operating a packing machine ( 1 ) for filling filled goods into sacks ( 13 ), in particular for filling bulk goods in bags, wherein the contents in a storage container ( 12 ) and the reservoir ( 12 ) with a metering device ( 3 ) and the sacks ( 13 ) by means of at least one filling device ( 5 ), wherein the metering device ( 3 ) by means of a control device ( 17 ) depending on the with a sensor device ( 6 ) continuously variable filling quantity ( 8th ) of the intermediately stored filling material in the storage container ( 12 ) is controlled to the filling quantity ( 8th ) in the storage container ( 12 ) to keep even. Method according to claim 18, wherein the filling quantity ( 8th ) is kept substantially maximum. Method according to one of claims 18 or 19, wherein the signal of the sensor device ( 6 ) is used for bag breakage detection. Method according to one of claims 18 to 20, wherein the filling amount is controlled to an adjustable value. Method according to one of claims 18 to 21, wherein the packing machine fully automatically adjusted. Method according to one of claims 18 to 22, wherein the reservoir ( 12 ) via at least two metering devices ( 3 ) Different contents are supplied. Method according to the preceding claim, wherein the signal of the sensor device ( 6 ) is used to control the supply of at least one additive. Method according to one of claims 23 or 24, wherein the said supplied Mass flow of the additive is weighed separately.